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Frontiers of Environmental Science & Engineering 2016年第3期10卷 447-457页

作者： guanglong pang Donghui WANG Yunhong ZHANG Chunyan MA Zhengping HAO Institute of Chemical Physics School of Chemistry Beijing Institute of Technology Beijing 100081 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Research Institute of Chemical Defense Beijing 100191 China

MnO2 microspheres with various surface structures were prepared using the hydrothermal method, and Au/MnO2 catalysts were synthesized using the sol-gel method. We obtained three MnO2 microspheres and Au/MnO2 samples： coherent solid spheres covered with wire-like nanostructures, solid spheres with nanosheets, and hierarchical hollow microspheres with nanoplatelets and nanorods. We investigated the properties and catalytic activities of formaldehyde oxidation at room temperature. Crystalline structures of MnO2 are the main factor affecting the catalytic activities of these samples, and γ- MnO2 shows high catalytic performance. The excellent redox properties are responsible for the catalytic ability of γ-MnO2. The gold-supported interaction can change the redox properties of catalysts and accelerate surface oxygen species transition, which can account for the catalytic activity enhancement of Au/MnO2. We also studied intermediate species. The dioxymethylene （DOM） and formate species formed on the catalyst surface were considered intermediates, and were ultimately transformed into hydrocarbonate and carbonate and then decomposed into CO2. A proposed mechanism of formaldehyde oxidation over Au/MnO2 catalysts was also obtained.

关键词： MnO2 microspheres Au/MnO2 formaldehyde oxidation γ-MnO2

Layered sphere-shaped TiO_2 capped with gold nanoparticles on structural defects and their catalysis of formaldehyde oxidation

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Journal of Environmental Sciences 2016年第1期28卷 77-85页

作者： Chunyan Ma guanglong pang Guangzhi He Yang Li Chi He Zhengping Hao Department of Environmental Nano-materials Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power EngineeringSchool of Energy and Power Engineering Xi'an Jiaotong University

We describe here a one-step method for the synthesis of Au/TiO2 nanosphere materials,which were formed by layered deposition of multiple anatase TiO2 *** Au nanoparticles were stabilized by structural defects in each TiO2 nanosheet,including crystal steps and edges,thereby fixing the Au-TiO2 perimeter *** transfer occurred along the gaps between these TiO2 nanosheet layers and in contact with catalytically active sites at the Au-TiO2 *** doped Au induced the formation of oxygen vacancies in the Au-TiO2 *** vacancies are essential for generating active oxygen species（-＊O^-） on the TiO2 surface and Ti^3＋ ions in bulk *** ions can then form Ti^3＋-O^--Ti^4＋species,which are known to enhance the catalytic activity of formaldehyde（HCHO） *** studies on structural and oxygen vacancy defects in Au/TiO2 samples provide a theoretical foundation for the catalytic mechanism of HCHO oxidation on oxide-supported Au materials.

关键词： Layered Au/TiO2 nanospheres Structural defects Oxygen vacancy defects Reaction mechanism Formaldehyde oxidation

“制造层级”:乡镇治理的机制创新与效能提升——以山东省J县W镇服务区为研究对象

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广西民族大学学报（哲学社会科学版） 2024年第1期46卷 9-20页

作者：田先红庞广龙华中师范大学中国农村研究院/政治学部湖北武汉430079 华中师范大学中国农村研究院湖北武汉430079

机制创新是基层政权提升治理能力与治理水平的重要举措。在国家基层政权建设愈发趋向于制度化、程序化和规范化的刚性要求下,乡镇政权如何通过机制创新使科层治理体制有效衔接非规则性的乡土社会,是提升乡镇政权治理能力首要面对的现实... 详细信息

机制创新是基层政权提升治理能力与治理水平的重要举措。在国家基层政权建设愈发趋向于制度化、程序化和规范化的刚性要求下,乡镇政权如何通过机制创新使科层治理体制有效衔接非规则性的乡土社会,是提升乡镇政权治理能力首要面对的现实问题。“制造层级”发端于基层政府对传统科层制的非正式运作,是介于常规化的科层制治理与反科层治理的一种中间形态,是乡镇政权的治理机制创新。服务区作为创设于乡镇与行政村之间的中间治理层级,蕴含着乡镇政府分解转化治理压力与治理责任、统筹分配治理任务与治理资源、分类适配治理力量与治理事务等内在逻辑,成为乡镇政权落实国家治理要求和实现自身治理意图的组织载体。通过“制造层级”,乡镇政府塑造了服务区这一实体治理单元,并在乡村治理实践中表现出独特的运行机制与功能角色。“制造层级”的机制创新实践,使得乡镇政权得以在层级内部锻造更具适应性和灵活性的治理能力,型构了乡村治理共同体的良性治理结构,从而在国家治理体系的末端维系了基层治理体制的弹性。

关键词：服务区 “制造层级” 治理效能基层治理现代化乡村治理共同体

内聚力模型参数对不同应力状态下粘接接头失效的影响

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中国胶粘剂 2021年第8期30卷 22-26页

作者：吴欣静秦国锋糜沛纹庞广龙谭佳敏广西师范大学职业技术师范学院广西桂林541004

内聚力模型参数是影响粘接接头失效仿真分析的主要因素。本文基于内聚力单元建立碳纤维增强基复合材料(CFRP)/铝合金单搭接接头和对接接头的仿真分析模型,并通过试验验证其仿真精度。选取了内聚力单元的六个参数,即杨氏/剪切模量、模式... 详细信息

内聚力模型参数是影响粘接接头失效仿真分析的主要因素。本文基于内聚力单元建立碳纤维增强基复合材料(CFRP)/铝合金单搭接接头和对接接头的仿真分析模型,并通过试验验证其仿真精度。选取了内聚力单元的六个参数,即杨氏/剪切模量、模式Ⅰ/Ⅱ失效强度和模式Ⅰ/Ⅱ断裂韧性,采用单因素试验方法和正交试验方法设计试验方案,研究了内聚力单元参数对应力状态和失效载荷的影响规律。研究结果表明:内聚力模型单一参数对单搭接接头和对接接头失效载荷的影响呈近似线性关系;单搭接接头的失效载荷主要受模式Ⅰ断裂韧性和模式Ⅱ失效强度影响,对接接头的失效载荷主要受模式Ⅰ失效强度和模式Ⅰ断裂韧性影响;不同内聚力模型参数组合对失效载荷的影响存在一定的耦合作用。

关键词：内聚力模型剪应力正应力失效载荷

Recovering indium with sulfating roasting from copper-smelting ash

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Rare Metals 2007年第5期26卷 488-491页

作者： ZHU Guocai ZHENG Mingdan FAN guanglong ZHAO Yuna Institute of Nuclear and New Energy Technology Tsinghua University Beijing 102201 China

A technology for recovering indium from Jinchuan copper-smelting ash was developed. Indium in the ash was first enriched to the leaching-slag in leaching process,and then recovered by sulfating roasting. The method included mixing the leaching-slag with sulfuric acid,making them into particles,roasting the mixture,and then leaching the calcine with hot water. Above 90% of indium in calcine could be dissolved into the leaching solution. The optimized conditions were determined as follows： the mass ratio of sulfuric acid to leaching slag was 0.1,the roasting time was about 1 to 1.5 h in the temperature range of 200-250℃,and the calcine was leached for 1 h with 5：1 of liquid/solid ratio at 60℃. Over 99% of indium in leaching solution was finally enriched by Zn substitution or sulfide precipitation.

关键词： environmental engineering indium roasting copper-smelting ash

On Multi-Frequency Channel Interference Alignment of 3 Channels and 4 Users

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China Communications 2016年第1期13卷 22-32页

作者： DU guanglong ZOU Weixia ZHOU Zheng Key Lab of Universal Wireless Communications MOEBeijing University of Posts and Telecommunications State Key Lab.of Millimeter Waves Southeast University

This paper explores the multi-frequency independent channel interference alignment(MFC-IA) system of 3 channels and4 users,and single data stream transmit,i.e.(3×3,1)~4 *** derive the analytic solution for(3×3,1)~4 MFC-IA *** on the analytic solution,an optimization problem is proposed aim at the optimal IA *** based on such a math model,we propose a simulated annealing(SA) algorithm to search optimal IA *** simulation results show that the simulated annealing IA algorithm has a better sum rate performance than iterative maximize signal to interference plus noise ratio(Max-SINR) *** result can be extended to single data stream multi-antenna IA system with 3 antennas and4 users.

关键词： communication and information system interference alignment multi-frequency channel analytic solution simulated annealing

A Carbon Isotopic Stratigraphic Pattern of the Late Palaeozoic Coals in the North China Platform and Its Palaeoclimatic Implications

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Acta Geologica Sinica(English Edition) 1999年第1期73卷 111-119页

作者： ZHANG Hong SHEN guanglong HE Zonglian 1. Institute of Geology Xi'an Branch China Coal Research Institute 44 Northern Yanta Road Xi'an 710054 Shaanxi Province China. 2. Department of Geology Northwest University 1 North Taibai Road Xi'an 710069 Shaanxi Province China

This paper gives the stable carbon isotopic data in coals from the Late Namurian to Kazanian stages in the Serteng Mt., Xishan and Huainan coalfields of the North China Platform. Its stratigraphic pattern shows that several isotopic shifts are apparent, and the large δ13C negative shifts (approximately 2.5 to 3.0 %%) occurred during the Stephanian, Artinskian and Kazanian are observed in three Permo-Carboniferous coalfields. Those negative shifts are neither related to the coal rank and coal macerals, nor caused by the variety of peat-forming plants. The general decrease in the δ13C values of the Stephanian, Artinskian and Kazanian coals is consistent with an overall decrease in the δ13C values of ambient atmospheric CO2 and/or a relative increase in atmospheric Pco2 during the coal-forming periods. Therefore the authors postulate that the oxidation of peat, and the δ13C-depleted CO2 flux into the atmosphere during the above stages may have contributed to coeval palaeoclimatic warming by way of the greenhouse effect.

关键词： carbon isotope coal palaeoclimate Late Palaeozoic the North China Platform

Microstructural strengthening and toughening mechanisms in Fe-containing Ti-6Al-4V:A comparison between homogenization and aging treated states

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Journal of Materials Science & Technology 2022年第4期99卷 114-126页

作者： Yu Liao Junhua Bai Fuwen Chen guanglong Xu Yuwen Cui Tech Institute for Advanced Materials&College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China

Microalloying of Ti–6Al–4V alloy by Fe addition has attracted interest as a promising way to improve castability and comprehensive mechanical *** mission of this work is twofold by employing the experimental examination and the phenomenological analysis,(1)to investigate the effect of Fe addition on the microstructure features and mechanical properties of the Fe-containing Ti–6Al–4V(TC4-xF)alloys subjected to casting and homogenization treatment,and(2)to unveil the critical microstructure features in homogenization,hot-worked and aging treated alloys,respectively,that benefit the yield strength and the fracture *** observations evidence that the addition of 0.5 wt.%Fe is most effective in enhancing the tensile ductility and the modeⅠfracture *** Fe addition up to 0.7–0.9 wt.%results in plateau values of yield and ultimate strengths with some *** analyses screen out the microstructural strengthening and toughening determinants which exhibit distinct sensitivities on Fe content under different processing *** solid solution strengthening is confirmed as the primary effect that governs the yield strength of the homogenization treated TC4-xF alloys,followed by the refined size of colony andαlamella,so does it for the hot-worked and the aging-treated *** strengthening effect of Fe could be further promoted by hot-working but impaired by a prolonged annealing time or a lowered cooling *** type of crack propagation path and theαmorphology are discerned to play their own leading roles in different cases to influence the performance of fracture toughness.A long crack propagation distance that traverses broadα/βlamellae embraces a high crack propagation resistance and gives rise to enhanced fracture *** experimental results enrich the dataset of microstructure features and mechanical properties of Ti–6Al–4V relevant *** upon the phenomenological analysis,the discove

关键词： Ti-6Al-4V Fe microalloying Homogenization Yield strength Fracture toughness Microstructural strengthening/toughening factors

DFT and 3D-QSAR Studies of Anti-Cancer Agents m-(4-Morpholinoquinazolin-2-yl) Benzamide Derivatives for Novel Compounds Design

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Journal of Ocean University of China 2018年第3期17卷 609-613页

作者： ZHAO Siqi ZHANG guanglong XIA Shuwei YU Liangmin Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education College of Chemistry and Chemical Engineering Ocean University of China

As a group of diversified frameworks, quinazolin derivatives displayed a broad field of biological functions, especially as anticancer. To investigate the quantitative structure-activity relationship, 3D-QSAR models were generated with 24 quinazolin scaffold molecules. The experimental and predicted pIC50 values for both training and test set compounds showed good correlation, which proved the robustness and reliability of the generated QSAR models. The most effective CoMFA and CoMSIA were obtained with correlation coefficient2ncv r of 1.00 （both） and leave-one-out coefficient q2 of 0.61 and 0.59, respectively. The predictive abilities of CoMFA and CoMSIA were quite good with the predictive correlation coefficients （2pred r ） of 0.97 and 0.91. In addition, the statis-tic results of CoMFA and CoMSIA were used to design new quinazolin molecules.

关键词： quinazolin derivatives anticancer 3D-QSAR electronic structure molecular design

昆明市景观格局时空动态变化对人为干扰的响应

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